Have TCW allowed people who have asked to play on stage?

I have seen other artists who have gone on tour (Green Day and the Backseat Lovers are some examples) allow their fans to play a song on stage with the band if they ask with a sign or something similar. I was just wondering if the Crane Wives have ever done that?

I'm asking because I plan on bringing a sign to the Vegas show tomorrow night and I just want to know if I should ask to play Easier or not. I have only been to one of their shows and I haven't seen anything online about anyone getting on stage and playing a song of theirs with them.

I understand how it seems greedy or very wishful to want to play on stage with my favorite band. But It wouldn't be during their album tour, just a regular tour, and they seem rather chill. Obviously, I will accept whatever answer they give, whether it's ignoring me, saying no, or kicking me out (which I doubt anyway) I just want to know if it would be a good idea. Thanks!